Download 11 Cold and warm fronts

Passage of a Cold Front Cold fronts occur when a __________ air mass replaces a __________ air mass. In a cold front the __________ air follows the warm air and, because__________ air is more dense, it pushes the __________ air out of its way, forcing it to rise. As the warm air rises, it becomes __________ and __________ start to form. Precipitation at cold fronts is usually heavier although less geographically extensive (50-­‐70 km) and less prolonged than rainfall associated with warm fronts. The reason for this is that the uplift of the warm air is stronger due to the undercutting of cold air, so __________, and _________, __________, __________and __________ can occur. The air behind a cold front is noticeably __________ and__________ than the air ahead of it. When the cold front passes through, temperatures can drop more than__________ in the first hour. Missing words : 15 degrees, cold, cold, colder, colder, cooler, clouds, drier, hail, rain, thunderstorms, tornados, towering clouds form, warm, warmer Passage of a Warm Front Once you have completed the Passage of Cold Front activity design a similar activity for the conditions associated with the passage of a warm front. Cold fronts occur when a __________ air mass replaces a __________ air mass. Missing words: cold, warm,